Catherine the Great was not actually Russian at all. She was born a Prussian (German) and married Peter the Great, who adored the Prussians. She was a German leader of the Russian throne after overthrowing her husband.
The answer to question is A the sixth century.
Hope this helps;)
The answer would be D the private banking system.
The answer is D because, that is the only answer that shows history in the light of great activity. B and C are irrelevant and A, means they were being controlled.